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JP3555762B2 - Low pH aqueous cosmetic gel containing nonionic polyacrylamide derivative - Google Patents

Low pH aqueous cosmetic gel containing nonionic polyacrylamide derivative Download PDF

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JP3555762B2
JP3555762B2 JP50777093A JP50777093A JP3555762B2 JP 3555762 B2 JP3555762 B2 JP 3555762B2 JP 50777093 A JP50777093 A JP 50777093A JP 50777093 A JP50777093 A JP 50777093A JP 3555762 B2 JP3555762 B2 JP 3555762B2
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polyacrylamide
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JPH07500593A (en
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エンデル ディクナー，ジョージ
スコット ロムバード，ブライアン
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Richardson Vicks Inc
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Abstract

A skin care composition in the form of a low pH aqueous gel. The compositions provide improved skinfeel and residue characteristics together with excellent moisturizing, emolliency, rub-in and absorption characteristics.

Description

技術分野
本発明は化粧品組成物に関する。特に、それは改善されたモイスチャライジング、皮膚軟化、すりこみ（rub−in）及び吸収特性と一緒に改善された皮膚感触及び残留物特性を示す水性ゲルの形態である安定な低pH化粧品組成物に関する。
発明の背景
様々な剤によるヒト皮膚の処理が長年にわたり試みられてきたが、そのゴールは皮膚を滑らかでしなやかなコンディションに保つことである。皮膚は長時間にわたり低湿度のコンディション又は洗剤溶液にさらされたときに乾いてしまう傾向を有する。皮膚はその構造の骨格を形成するケラチン及びコラーゲン繊維タンパク質をコートして保護する数層の細胞から構成されている。角質層と称されるこれら層の最外部は80Å厚層で囲まれた250Åタンパク質束から構成されていることが知られている。アニオン系界面活性剤及び有機溶媒は典型的には角質層膜に浸透して、脱脂質化（即ち、角質層からの脱質の除去）によりその一体性を破壊する。皮膚表面形態のこの破壊は荒い感触を生じ、ついには界面活性剤又は溶媒をケラチンと相互作用させて、刺激を起こさせる。
角質層で適正な水勾配を維持することはその機能にとり重要であることが現在認識されている。この水のほとんどは、これは時には角質層可塑化剤であると考えられるが、体の内部から出てくる。湿度が寒冷気候のように低すぎる場合には、組織を適正に可塑化する上で不十分な水が角質層の外層に留まるだけである；皮膚は鱗片化し始め、かゆくなる。皮膚透過性は角質層に不十分な水しか存在しないときにもやや減少する。他方、皮膚の外側に水が多すぎると角質層にそれ自体の重量の３〜５倍の結合水を最終的に吸収させる。これは皮膚を膨潤してしわ縮みさせ、水及び他の極性分子に対する皮膚の透過性を約２〜３倍増加させる。
例えばSagarin,Cosmetics Science and Technology,2nd Edition,Volume 1,Wiley Interscience（1972）及びEncyclopedia of Chemical Technology,Third Edition,Volume 7で記載されたような慣用的化粧品クリーム及びローション組成物は様々な程度の皮膚軟化、バリヤ及び水滞留（モイスチャライジング）効果を示すことが知られている。しかしながら、それらはすりこみ、吸収及び残留物特性が乏しいだけでなく皮膚感触の面でもひどく否定的な要素を有する（即ち、それらは皮膚上でかなりべとついて感じることが多い）。他の化粧品組成物は例えば1989年６月16日付で発行されたGeorgalasらの米国特許第4,837,019号及び1989年９月５日付で発行されたDecknerらの米国特許第4,863,725号明細書で開示されており、その双方が参考のためここに組み込まれる。更に、低pHキャリアから多くの化粧品成分及び医薬活性剤を送達することが望ましい；しかしながら、現在まで適切な低pHビヒクルは開発されていない。しかも多くの医薬及び化粧品活性剤は効力及び／又は安定性のために低pH環境を要する。現在の低pHビヒクルは天然ガムと無機粘土及び粉末を含むが、満足できるとは証明されていない。これらの系は安定性に乏しく、皮膚を乾燥させすぎ、化粧品上望ましくなく、即ち美観に乏しい。
ポリアクリル酸、例えばカルボマーは化粧品組成物を増粘化することがよく知られている；しかしながら、これらの増粘剤は低pHで使用できない。したがって、医薬及び化粧品活性剤を送達するために使用できる比較的高粘度の化粧品上エレガントで安定な低pH化粧品組成物に関して大きな必要性が存在している。
本発明者らは低pH化粧品組成物中における高分子量を有した特定のポリアクリルアミドの使用が優れた化粧品効果を示し、更には低pH系で改善された安定性も示すことを発見した。更に、活性剤を溶解する上で必要なアルコールのような溶媒及び他の水溶性成分も高レベルで組成物中に含有させることができる。
したがって、本発明はある低pH化粧品成分及び医薬活性剤にとり優れたキャリアであって、更に高い溶媒抵抗性を有する低pHゲルタイプの化粧品組成物を提供する。
本発明は短期又は長期いずれかのモイスチャライジング有効性又は皮膚軟化性を損なわずに吸収、残留物及び皮膚感触特性に関して改善を示す安定な低pHゲルタイプの化粧品組成物も提供する。
したがって、本発明の目的はある低pH化粧品成分及び医薬活性剤にとり優れたキャリアであって、粘着性が減少してユーザーに滑らかな皮膚感触を与える改善された化粧品組成物を提供することである。
本発明のこれら及び他の目的は下記開示から明らかになるであろう。
発明の要旨
したがって、本発明は約1,000,000〜約30,000,000の分子量を有する非イオン性ポリアクリルアミド約0.05〜約20％を含む水性ゲルの形でスキンケア組成物を提供し、その組成物は約４以下のpHを有する。
ここで用いられたすべてのパーセンテージ及び比率は他で指摘されないかぎり重量により、すべて25℃で測定されている。
発明の具体的な説明
本発明の低pH組成物は非イオン性ポリマー及び水の組合せから形成され、そのpHは約４以下、好ましくは約3.5以下、最も好ましくは約3.0以下のpHに調整される。すべてのレベル及び比率は他で指摘されないかぎり全組成物の重量による。これらの組成物は高い溶媒抵抗性も有し、即ち活性剤を溶解する上で必要なアルコールのような溶媒及び他の水溶性成分も高レベルで組成物中に含有させることができる。
非イオン性ポリアクリルアミド 本発明で有用な非イオン性ポリマーは分岐状又は非分岐状のポリアクリルアミド及び置換ポリアクリルアミドである。これらのポリマーは非置換であるか又は１もしくは２つのアルキル基（好ましくはC1−C5）で置換されたアクリルアミド及びメタクリルアミドを含む様々なモノマーから形成することができる非イオン性水分散性ポリマーである。アミド窒素が非置換であるか又は１もしくは２つのC1−C5アルキル基（好ましくはメチル、エチル又はプロピル）で置換されたアクリレートアミド及びメタクリレートアミド、例えばアクリルアミド、メタクリルアミド、Ｎ−メチルアクリルアミド、Ｎ−メチルメタクリルアミド、N,N−ジメチルメタクリルアミド、Ｎ−イソプロピルアクリルアミド、Ｎ−イソプロピルメタクリルアミド及び、N,N−ジメチルアクリルアミドが好ましい。これらのモノマーは参考のためその全体でここに組み込まれる1990年10月16日付で発行されたBolich,Jr.らの米国特許第4,963,348号明細書で一般的に開示されている。これらのコポリマーは場合によりジアニケニル化合物のような慣用的中性架橋剤を用いて形成してもよい。カチオン性ポリマーに関するこのような架橋剤の使用は1986年12月９日付で発行されたGloverらの米国特許第4,628,078号及び1986年７月８日付で発行されたFlesherらの米国特許第4,599,379号明細書で開示されており、その双方が参考のためここに組み込まれる。これらの非イオン性コポリマーは約1,000,000以上、好ましくは約1,500,000以上の分子量を有し、約30,000,000以内の範囲である。好ましくは、これらの非イオン性ポリアクリルアミドはポリアクリルアミドの水分散性を促進する上で役立つ高HLB界面活性剤（約７〜約10のHLB）を含有した鉱油等のような非水混和性溶媒に前分散される。CTFA表示でポリアクリルアミド、イソパラフィン及びセピック社（Seppic Corporation）からセピゲル（Sepigel）として市販されているラウレス−７の非イオン性ポリマーがここでは使用上最も好ましい。
これらの非イオン性ポリアクリルアミドは約0.05〜約20％、好ましくは約0.5〜10％、最も好ましくは約１〜約10％のレベルで存在する。
これらの組成物は様々な任意成分と組合せることが好ましい。最も好ましくは、これらのゲルは医薬活性剤、最も好ましくは抗アクネ活性剤のためのキャリアとして用いられる。本発明の組成物は性質上酸性であるか又は最良の送達性又は安定性のために低いpHを要する活性成分にとり最も有用である。
医薬活性剤 本発明で有用な医薬活性剤には何らかの望ましい局部又は全身効果を誘導する局所投与用に適したあらゆる化学物質又は化合物を含む。これらの活性剤は約0.1〜約20％のレベルで存在する。このような剤としては限定されないが、抗アクネ薬、非ステロイド系抗炎症薬、ステロイド系抗炎症薬、無日光日焼け色化剤、日焼け止め剤、創傷治癒剤、皮膚漂白又は淡色化剤、抗ヒスタミン薬、鎮咳薬、止痒薬、抗コリン作動薬、制吐及び抗悪心薬、食欲抑制薬、中枢刺激薬、抗不整脈薬、β−アドレナリン遮断薬、強心薬、降圧薬、利尿薬、血管拡張薬、血管収縮薬、抗潰瘍薬、麻酔薬、抗うつ薬、トランキライザー、鎮静薬、抗精神病薬、抗菌楠、抗新生物薬、抗マラリア薬、筋肉弛緩薬、鎮痙薬、止瀉薬、骨活性薬とそれらの混合物がある。
ジヒドロキシアセトン、グリセルアルデヒド、インドール類及びそれらの誘導体等を含めた無日光日焼け色化剤も本発明で有用である。これらの無日光日焼け色化剤は参考のためここに組み込まれるSagarinら,Cosmetics Science and Technology,Chapter VIII,pages 189以下で開示されたような慣用的日焼け止め剤並びにペプチド誘導体、酵母、パンテノール、イアミン及びキネチンのような創傷治癒剤と組合せて用いてもよい。
他の有用な皮膚活性剤としては限定されないがヒドロキノン、アスコルビン酸、コウジ酸及びメタ重亜硫酸ナトリウムを含めた皮膚漂白（又は淡色化）剤がある。
最も好ましい薬物活性剤は抗アクネ薬である。本発明で使用上好ましい抗アクネ薬にはサリチル酸、イオウ、乳酸、グリコール酸、ピルビン酸、尿素、レゾルシノール及びＮ−アセチルシステインのような角質溶解剤；レチノイン酸及びその誘導体（例えば、シス及びトランス）のようなレチノイド類；過酸化ベンゾイル、オクトピロックス、エリトロマイシン、テトラサイクリン、トリクロサン、アゼライン酸及びその誘導体、フェノキシエタノール及びフェノキシプロパノール、酢酸エチル、クリンダマイシンとメクロサイクリンのような抗生物質及び抗菌剤；フラビノイド類のような脂質抑制剤（sebostat）；α及びβ−ヒドロキシ酸；硫酸シムノール及びその誘導体、デオキシコール酸塩とコール酸塩のような胆汁酸塩がある。
ビタミン 様々なビタミン類も本発明の組成物に含有させてよい。例えば、アスコルビン酸、パントテン酸、ビタミンＥ、トコフェロール等。
水溶性保湿剤 これらの組成物は１種以上の保湿剤／モイスチャライザーも含有することができる。様々な保湿剤／モイスチャライザーが使用でき、約１〜約30％、更に好ましくは約２〜約８％、最も好ましくは約３〜約５％のレベルで存在できる。これらの物質にはソルビトール、グリセリン、ヘキサントリオール、プロピレングリコール、ヘキシレングリコール等のようなポリヒドロキシアルコール類；ポリエチレングリコール；糖及びデンプン類；糖及びデンプン誘導体（例えば、アルコキシル化グルコース）;D−パンテノール；ヒアルロン酸；ラクタミドモノエタノールアミン；アセトアミドモノエタノールアミン;2−ピロリドン−５−カルボン酸とそれらの混合物がある。
本発明の組成物で使用上好ましい保湿剤／モイスチャライザーはC3−C6ジオール及びトリオール類である。トリオールのグリセリンが特に好ましい。本発明の組成物は組成物の身体及び／又は治療効果を修正する薬学上許容される任意成分も含有してよい。このような任意成分には例えば追加溶媒、乳化剤、ゲル化剤、芳香剤、保存剤及び安定剤がある。他の有用な保湿剤としてはグルコシド類〔例えば、アメルコール社（Amerchol Corporation）から入手できるグルカム（glucam）E10及びE20〕、ラクタミドモノエタノールアミン及びアセトアミドモノエタノールアミンがある。
これら水溶性保湿剤の混合物も使用できる。
本発明において、水溶性保湿剤は組成物の重量で約0.5〜約20％、好ましくは約１〜約10％、更に好ましくは約４〜約８％のレベルで存在する。
任意の親水性ゲル化剤 本発明の低pHゲル組成物は好ましくは約0.05〜約１％、更に好ましくは約0.1〜約１％のレベルで親水性ゲル化剤（低いpHで安定である）を更に含有してもよい。ゲル化剤は好ましくは少くとも約4000cps、更に好ましくは少くとも約10,000cps、最も好ましくは少くとも約50,000cpsの粘度（１％水溶液、20℃、ブルックフィールドRVT）を有する。
適切な親水性ゲル化剤は水溶性又はコロイド水溶性ポリマーとして通常記載でき、セルロースエーテル（例えば、ヒドロキシエチルセルロース、メチルセルロース）、ヒドロキシプロピルグアーガム及びキサンガムを含む。ヘクトライト（ビーガム）及びベントナイトのような粘土も有用である。
皮膚軟化剤 本発明の組成物は少くとも１種の皮膚軟化剤（低pHで安定である）も含んでよい。好ましい皮膚軟化剤は揮発性シリコーン油、非揮発性皮膚軟化剤及びそれらの混合物である。本発明の組成物は液体皮膚軟化剤として機能する少くとも１種の揮発性シリコーン油又は特に揮発性シリコーン油及び非揮発性皮膚軟化剤の混合物を含むことが更に好ましい。ここで用いられる“揮発性”という用語は環境温度で測定しうるような蒸気圧を有する物質に関する。
本発明の組成物で有用な揮発性シリコーン油は約３〜約９、好ましくは約４〜約５つのケイ素原子を有する環状又は直鎖ポリジメチルシロキサンであることが好ましい。下記式はここで開示された組成物において有用な環状揮発性ポリジメチルシロキサンについて示す：

Figure 0003555762
上記においてｎは約３〜約７である。直鎖ポリジメチルシロキサンは分子当たり約３〜約９つのケイ素原子を含み、下記一般式を有する：
（CH3）3Si−Ｏ−［Si（CH3）２−Ｏ］ｎ−Si（CH3）３
上記においてｎは約１〜約７である。直鎖揮発性シリコーン物質は通常25℃で約0.5センチストークスの粘度を有し、一方環状物質は典型的には約10センチストークス以下の粘度を有する。様々な揮発性シリコーン油の記載はToddら,"Volatile Silicone Fluids for Cosmetics"（化粧品品用の揮発性シリコーン液）,Cosmetics＆Toiletries,91,pages 27−32（1976）でみられ、その開示は参考のためそれら全体でここに組み込まれる。
ここで有用な好ましい揮発性シリコーン油の例としてはダウ・コーニング344、ダウ・コーニング345及びダウ・コーニング200〔ダウ・コーニング社（Dow Corning Corp.）製〕；シリコーン7207及びシリコーン7158〔ユニオン・カーバイド社（Union Carbide Corp.）製〕;SF1202〔ゼネラル・エレクトリック（General Electric）製〕;SWS−03314（SWSシリコーンズ社製）がある。
本発明は１種以上の非揮発性皮膚軟化剤も含有することが好ましい。このような物質には炭化水素〔例えば、ペルメチル（Permethyl）類〕、プロポキシル化アルコール、非揮発性シリコーン油及びそれらの混合物がある。皮膚軟化剤としてここで有用なものは1,Cosmetics,Science and Technology,27−104（M.Balsam及びE.Sagarin,Ed.;1972）及び1980年５月13日付で発行されたSheltonの米国特許第4,202,879号明細書（双方とも参考のためここに組み込まれる）で記載されている。
皮膚軟化物質として有用な非揮発性シリコーン油としてはポリアルキルシロキサン、ポリアルキルアリールシロキサン及びポリエーテルシロキサンコポリマーがある。ここで有用な本質的に非揮発性のポリアルキルシロキサンには例えば25℃で約５〜約100,000センチストークスの粘度のポリジメチルシロキサンがある。本組成物で有用な好ましい非揮発性皮膚軟化剤の中には25℃で約10〜約400センチストークスの粘度を有するポリジメチルシロキサンがある。このようなポリアルキルシロキサンとしてはビカシル（Vicasil）シリーズ（ゼネラル・エレクトリック社販売）及びダウ・コーニング200シリーズ（ダウ・コーニング社販売）がある。ポリアルキルアリールシロキサンには25℃で約15〜約65センチストークスの粘度を有するポリメチルフェニルシロキサンがある。これらは例えばSF1075メチルフェニル液（ゼネラル・エレクトリック社販売）及び556コスメチックグレード液（Cosmetic Grade Fluid）（ダウ・コーニング社販売）として市販されている。有用なポリエーテルシロキサンコポリマーとしては例えば25℃で約1200〜約1500センチストークスの粘度を有するポリオキシアルキレンエーテルコポリマーがある。このような液はSF−1066有機シリコーン界面活性剤（ゼネラル・エレクトリック社販売）として市販されている。ポリシロキサンエチレングリコールエーテルコポリマーが本組成物で使用上好ましいコポリマーである。
皮膚軟化剤は典型的には全体として本発明の組成物の約２〜約10重量％、最も好ましくは約２〜約６％である。
しかしながら、いくつかの追加水溶性物質も本発明の組成物に加えることができる。このような物質としてはソルビトール、プロピレングリコール、エトキシル化グルコース及びヘキサントリオールのような他の保湿剤；サリチル酸のような角質溶解剤；タンパク質、ポリペプチド及びそれらの誘導体；ジャマール（Germall）115、ヒドロキシ安息香酸のメチル、エチル、プロピル及びブチルエステル、EDTA、ユーキシル（Euxyl）（RTM）K400、ブロモポール（Bromopol）（２−ブロモ−２−ニトロプロパン−1,3−ジオール）、フェノキシプロパノール、DMDMヒダントイン/3−ヨード−２−プロピニルブチルカルバメート〔グリダント（Glydant▲R▼）及びグリダント・プラス（Glydant Plus▲R▼）として市販〕のような水溶性又は可溶性保存剤；アーガサン（Irgasan）（RTM及びフェノキシエタノールのような抗菌剤（好ましくは0.5〜約５％のレベル）；ヒアルロン酸、キトサン及び着色剤のような可溶性又はコロイド可溶性モイスチャライジング剤；香料及び香料溶解剤等がある。アルコール；香料及び香料溶解剤等がある。水もこの組成物の約50〜約99.3重量％、好ましくは約80〜約95％のレベルで存在する。
他の任意成分 様々な追加成分も本発明のエマルジョン組成物に加えてよい。これらの追加成分としては膜形成特性及び処方の実質性を助けるための様々なポリマー、組成物の抗菌保全性を維持するための保存剤、酸化防止剤と芳香剤、顔料及び着色剤のような美的目的に適した剤がある。
本発明の組成物は水性ゲル形であり、少くとも約4000、好ましくは約4000〜約300,000cps、更に好ましくは約20,000〜約200,000cps、特に約80,000〜約150,000cps（20℃、ニート、ブルックフィールドRVT）の範囲内で製品粘度を有するように処方されることが好ましい。組成物は視覚的に半透明であることが好ましい。組成物は油を実質上含まず、即ち10℃で水性ゲルマトリックスに不溶性であるか又はコロイド可溶性でない物質を約１％以下、好ましくは約0.1％以下で含有するだけである。ここで“コロイド可溶性”とは通常のコロイドサイズ範囲、典型的には１〜1000nm、特に１〜500nmの粒子に関する。高度に好ましい態様において、組成物は20℃で蒸留水に不溶性であるか又はコロイド可溶性でない物質を実質上含まない。このような物質としては炭化水素油及びロウ、脂肪アルコール、ラノリンから抽出されるある脂肪アルコールエーテル及びステロール類、蜜ロウ誘導体、植物ロウ、ステロール類とアミド類のような多くの慣用的な皮膚軟化物質がある。しかしながら、組成物は例えば視覚効果目的で加えられる低レベルの不溶性成分、例えばチタネート化マイカを含有することができる。
これらの組成物はエタノール、イソプロパノール、ブチレングリコール、ヘキシレングリコール、ポリエチレングリコール及びポリプロピレングリコールのような共溶媒を更に含有してもよい。
本発明の組成物は非水溶性油相を乳化するために化粧品クリーム及びローション組成物に慣用的に加えられる追加界面活性物質の必要性を有しない。
下記例は本発明の範囲内における態様について更に記載及び実証している。例は単に説明目的で示され、本発明の制限として解釈されるべきでなく、その多くのバリエーションが本発明の精神及び範囲から逸脱せずに可能である。
諸成分は化学又はCTFA名で示される。
例
例Ｉ
抗アクネ組成物は慣用的なミキシング技術を用いて下記成分を混ぜることにより製造する。
成分 （％W/W）
糖製水 54.0
アルコールSD40 40.0
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−71 4.0
サリチル酸 2.0
１セピック社からセピゲルとして市販
水を適切なサイズの容器に加える。中程度の速度（300rpm）でミキシングしながら、ポリクォータニウム−32及び鉱油を水に加える。別に、アルコールを容器にいれておき、蓋をする。３ブレードパドルプロペラ装備のライトニン（Lightnin）ミキサーを用いて、サリチル酸をアルコールに加え、すべてのサリチル酸が溶解するまで低速（100rpm）でミックスする。アルコールを水相にゆっくりと加えて、ゲルを形成させる。得られたゲルを均一になるまで中程度の速度でミックスする。
組成物は優れたモイスチャライジング、皮膚軟化、すりこみ及び吸収特性と一緒に改善された皮膚感触及び残留物特性を示す。
例II
無日光日焼け色化組成物は例Ｉで前記されたような慣用的なミキシング技術を利用して下記成分を混ぜることにより製造する。
成分 （％W/W）
糖製水 91.5
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−７ 3.0
ジヒドロキシアセトン 3.0
ベンジルアルコール 0.5
例III
抗アクネ組成物は例Ｉのように下記成分を混ぜることにより製造する。
成分 （％W/W）
糖製水 88.0
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−７ 2.0
過酸化ベンゾイル 10.0
例IV
局所鎮痛組成物は下記成分を混ぜることにより製造する。
成分 （％W/W）
糖製水 52.395
アルコールSD40 40.000
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−７ 4.000
イブプロフェン 5.000
グリセリン 1.000
アロエ・ベラ（Aloe Vera）ゲル 0.500
メントール 0.100
EDTA二ナトリウム 0.005
アルコールを適切なサイズの容器に加える。３ブレードパドルプロペラ装備のライトニンミキサーを用いて、イブプロフェンをアルコールに加え、イブプロフェンが溶解するまで低速（100rpm）でミックスする。メントールをアルコールに加え、溶解するまでミックスする。別に、水を適切なサイズの容器に加えておく。アロエ・ベラゲル及びEDTA二ナトリウムを水に加え、完全に溶解するまで低速（100rpm）でミックスする。次いで水相をアルコール相に加え、透明になるまでミックスする。グリセリンを加え、透明になるまでミックスする。中程度の速度（300rpm）でミキシングしながら、ポリアクリルアミド、C13-14イソパラフィン及びラウレス−７を加えて、ゲルを形成させる。得られたゲルを均一になるまで中程度の速度でミックスする。
例Ｖ
抗アクネ組成物は例Ｉのように下記成分を混ぜることにより製造するが、但しpHは10％クエン酸溶液で約4.0以下に調整する。
成分 （％W/W）
糖製水 87.5
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−７ 2.0
尿素 10.0
ベンジンアルコール 0.5
例VI
モイスチャライジング組成物は例Ｉのように下記成分を混ぜることにより製造する。
成分 （％W/W）
糖製水 93.5
ポリアクリルアミド、C13-14イソパラフィン
及びラウレス−７ 2.0
グリセリン 3.0
ベンジンアルコール 0.5
２−ピロリドン−５−カルボン酸 1.0TECHNICAL FIELD The present invention relates to cosmetic compositions. In particular, it relates to a stable low pH cosmetic composition in the form of an aqueous gel that exhibits improved skin feel and residue properties along with improved moisturizing, emollient, rub-in and absorption properties.
BACKGROUND OF THE INVENTION Although the treatment of human skin with various agents has been attempted for many years, the goal is to keep the skin in a smooth, supple condition. Skin has a tendency to dry out when exposed to low humidity conditions or detergent solutions for extended periods of time. The skin is composed of several layers of cells that coat and protect the keratin and collagen fiber proteins that form the skeleton of its structure. It is known that the outermost of these layers, called the stratum corneum, is composed of a 250 ° protein bundle surrounded by an 80 ° thick layer. Anionic surfactants and organic solvents typically penetrate the stratum corneum membrane and destroy its integrity by delipidation (ie, removal of delamination from the stratum corneum). This disruption of the skin surface morphology produces a rough feel and eventually causes a surfactant or solvent to interact with the keratin, causing irritation.
It is now recognized that maintaining a proper water gradient in the stratum corneum is important to its function. Most of this water comes from inside the body, although this is sometimes thought to be a stratum corneum plasticizer. If the humidity is too low, such as in a cold climate, insufficient water remains in the outer layers of the stratum corneum to adequately plasticize the tissue; the skin begins to scale and itchy. Skin permeability is also slightly reduced when there is insufficient water in the stratum corneum. On the other hand, too much water on the outside of the skin will eventually allow the stratum corneum to absorb 3-5 times its own weight of bound water. This causes the skin to swell and wrinkle, increasing the skin's permeability to water and other polar molecules by a factor of about 2-3.
Conventional cosmetic creams and lotions compositions, such as those described in Sagarin, Cosmetics Science and Technology, 2nd Edition, Volume 1, Wiley Interscience (1972) and Encyclopedia of Chemical Technology, Third Edition, Volume 7, have varying degrees of skin. It is known to exhibit softening, barrier and water retention (moisturizing) effects. However, they not only have poor abrasion, absorption and residue properties, but also have severely negative factors in terms of skin feel (i.e. they often feel quite sticky on the skin). Other cosmetic compositions are disclosed, for example, in Georgalas et al., U.S. Patent No. 4,837,019, issued June 16, 1989, and Deckner et al., U.S. Patent No. 4,863,725, issued September 5, 1989. And both are incorporated herein by reference. In addition, it is desirable to deliver many cosmetic ingredients and pharmaceutically active agents from low pH carriers; however, no suitable low pH vehicle has been developed to date. Moreover, many pharmaceutical and cosmetic actives require a low pH environment for efficacy and / or stability. Current low pH vehicles include natural gums and inorganic clays and powders, but have not proven satisfactory. These systems have poor stability, make the skin too dry and are cosmetically undesirable, i.e. poor aesthetics.
It is well known that polyacrylic acids, such as carbomer, thicken cosmetic compositions; however, these thickeners cannot be used at low pH. Thus, there is a great need for relatively high viscosity cosmetically elegant and stable low pH cosmetic compositions that can be used to deliver pharmaceutical and cosmetic actives.
The present inventors have discovered that the use of certain polyacrylamides having a high molecular weight in low pH cosmetic compositions shows excellent cosmetic effects and also shows improved stability in low pH systems. In addition, solvents such as alcohols and other water-soluble components required to dissolve the active agent can be included in the composition at high levels.
Therefore, the present invention provides a low pH gel type cosmetic composition which is an excellent carrier for certain low pH cosmetic ingredients and pharmaceutically active agents and has higher solvent resistance.
The present invention also provides a stable, low pH gel-type cosmetic composition that shows improved absorption, residue and skin feel properties without compromising either short or long term moisturizing efficacy or emolliency.
Accordingly, it is an object of the present invention to provide an improved cosmetic composition which is an excellent carrier for certain low pH cosmetic ingredients and pharmaceutically active agents, which has reduced stickiness and gives users a smooth skin feel. .
These and other objects of the invention will be apparent from the disclosure below.
SUMMARY OF THE INVENTION Accordingly, the present invention provides a skin care composition in the form of an aqueous gel comprising about 0.05 to about 20% of a nonionic polyacrylamide having a molecular weight of about 1,000,000 to about 30,000,000, wherein the composition comprises about 4 or less. Has a pH.
All percentages and ratios used herein are all measured at 25 ° C. by weight unless otherwise indicated.
DETAILED DESCRIPTION OF THE INVENTION The low pH composition of the present invention is formed from a combination of a nonionic polymer and water, the pH of which is adjusted to a pH of about 4 or less, preferably about 3.5 or less, and most preferably about 3.0 or less. You. All levels and ratios are by weight of total composition unless otherwise indicated. These compositions also have high solvent resistance, ie, solvents such as alcohols and other water-soluble components required to dissolve the active agent can be included in the compositions at high levels.
Nonionic Polyacrylamides Nonionic polymers useful in the present invention are branched or unbranched polyacrylamides and substituted polyacrylamides. These polymers unsubstituted or 1 or two alkyl groups (preferably C 1 -C 5) non-ionic water-dispersible, which can be formed from a variety of monomers containing substituted acrylamides and methacrylamides in It is a polymer. Acrylate amides and methacrylate amides in which the amide nitrogen is unsubstituted or substituted by one or two C 1 -C 5 alkyl groups (preferably methyl, ethyl or propyl), such as acrylamide, methacrylamide, N-methylacrylamide, N-methylmethacrylamide, N, N-dimethylmethacrylamide, N-isopropylacrylamide, N-isopropylmethacrylamide, and N, N-dimethylacrylamide are preferred. These monomers are generally disclosed in US Pat. No. 4,963,348 to Bolich, Jr. et al., Issued Oct. 16, 1990, which is incorporated herein by reference in its entirety. These copolymers may optionally be formed using conventional neutral crosslinkers such as dianikenyl compounds. The use of such crosslinkers with cationic polymers is disclosed in U.S. Pat. No. 4,628,078 to Glover et al. Issued on Dec. 9, 1986 and U.S. Pat. No. 4,599,379 issued to Flesher et al. Issued Jul. 8, 1986. And both are incorporated herein by reference. These nonionic copolymers have a molecular weight of about 1,000,000 or more, preferably about 1,500,000 or more, and range up to about 30,000,000. Preferably, these non-ionic polyacrylamides are non-water-miscible solvents such as mineral oils containing high HLB surfactants (about 7 to about 10 HLB) that help promote the water dispersibility of the polyacrylamide. Is pre-dispersed. Polyacrylamide, isoparaffin and the non-ionic polymer of laureth-7 marketed as Sepigel by Seppic Corporation under the CTFA designation are most preferred for use herein.
These nonionic polyacrylamides are present at a level of about 0.05 to about 20%, preferably about 0.5 to 10%, and most preferably about 1 to about 10%.
These compositions are preferably combined with various optional ingredients. Most preferably, these gels are used as carriers for pharmaceutically active agents, most preferably anti-acne actives. The compositions of the present invention are most useful for active ingredients that are acidic in nature or require a low pH for best delivery or stability.
Pharmaceutically Active Agents Pharmaceutically active agents useful in the present invention include any chemical or compound suitable for topical administration that induces any desired local or systemic effect. These actives are present at a level of about 0.1 to about 20%. Such agents include, but are not limited to, anti-acne drugs, non-steroidal anti-inflammatory drugs, steroidal anti-inflammatory drugs, sunless suntans, sunscreens, wound healing agents, skin bleaching or lightening agents, Histamine, antitussive, antipruritic, anticholinergic, antiemetic and anti-nausea, appetite suppressant, central stimulant, antiarrhythmic, β-adrenergic blocker, inotropic, antihypertensive, diuretic, vascular Dilators, vasoconstrictors, antiulcers, anesthetics, antidepressants, tranquilizers, sedatives, antipsychotics, antibacterial agents, antineoplastics, antimalarials, muscle relaxants, antispasmodics, antidiarrheals, bone There are active drugs and their mixtures.
Sunlight free tanning agents, including dihydroxyacetone, glyceraldehyde, indoles and their derivatives, are also useful in the present invention. These sunless suntans are incorporated herein by reference, and include conventional sunscreens as disclosed in Sagarin et al., Cosmetics Science and Technology, Chapter VIII, pages 189 et seq. And peptide derivatives, yeast, panthenol, It may be used in combination with wound healing agents such as iamine and kinetin.
Other useful skin actives include skin bleaching (or lightening) agents including but not limited to hydroquinone, ascorbic acid, kojic acid and sodium metabisulfite.
The most preferred pharmaceutically active agents are anti-acne drugs. Preferred anti-acne agents for use in the present invention include keratolytic agents such as salicylic acid, sulfur, lactic acid, glycolic acid, pyruvic acid, urea, resorcinol and N-acetylcysteine; retinoic acid and its derivatives (eg, cis and trans) Retinoids such as benzoyl peroxide, octopirox, erythromycin, tetracycline, triclosan, azelaic acid and derivatives thereof, antibiotics and antibacterials such as phenoxyethanol and phenoxypropanol, ethyl acetate, clindamycin and meclocycline Agents; lipid inhibitors (sebostats) such as flavinoids; α and β-hydroxy acids; simnol sulfate and its derivatives; bile salts such as deoxycholate and cholate.
Vitamins Various vitamins may also be included in the compositions of the present invention. For example, ascorbic acid, pantothenic acid, vitamin E, tocopherol and the like.
Water-soluble humectants These compositions can also contain one or more humectants / moisturizers. A variety of humectants / moisturizers can be used and can be present at a level of about 1 to about 30%, more preferably about 2 to about 8%, and most preferably about 3 to about 5%. These materials include polyhydroxy alcohols such as sorbitol, glycerin, hexanetriol, propylene glycol, hexylene glycol, etc .; polyethylene glycol; sugars and starches; sugar and starch derivatives (eg, alkoxylated glucose); Tenol; hyaluronic acid; lactamide monoethanolamine; acetamidomonoethanolamine; 2-pyrrolidone-5-carboxylic acid and mixtures thereof.
Usage Preferred humectants / moisturizers in the compositions of the present invention are C 3 -C 6 diols and triols. Triol glycerin is particularly preferred. The compositions of the present invention may also contain any pharmaceutically acceptable ingredients that modify the physical and / or therapeutic effect of the composition. Such optional ingredients include, for example, additional solvents, emulsifiers, gelling agents, fragrances, preservatives and stabilizers. Other useful humectants include glucosides (eg, glucam E10 and E20 available from Amerchol Corporation), lactamide monoethanolamine and acetamidomonoethanolamine.
Mixtures of these water-soluble humectants can also be used.
In the present invention, the water-soluble humectant is present at a level of about 0.5 to about 20%, preferably about 1 to about 10%, more preferably about 4 to about 8% by weight of the composition.
Optional Hydrophilic Gelling Agent The low pH gel compositions of the present invention are preferably hydrophilic gelling agents (stable at low pH) at a level of about 0.05 to about 1%, more preferably about 0.1 to about 1%. May be further contained. The gelling agent preferably has a viscosity (1% aqueous solution, 20 ° C, Brookfield RVT) of at least about 4000 cps, more preferably at least about 10,000 cps, and most preferably at least about 50,000 cps.
Suitable hydrophilic gelling agents can usually be described as water-soluble or colloid-water-soluble polymers and include cellulose ethers (eg, hydroxyethylcellulose, methylcellulose), hydroxypropyl guar gum and xantham. Clays such as hectorite (veegum) and bentonite are also useful.
Emollients The compositions of the present invention may also include at least one emollient, which is stable at low pH. Preferred emollients are volatile silicone oils, nonvolatile emollients and mixtures thereof. It is further preferred that the composition according to the invention comprises at least one volatile silicone oil which functions as a liquid emollient or in particular a mixture of a volatile silicone oil and a non-volatile emollient. The term "volatile" as used herein relates to a substance having a vapor pressure that can be measured at ambient temperature.
The volatile silicone oil useful in the compositions of the present invention is preferably a cyclic or linear polydimethylsiloxane having from about 3 to about 9, preferably from about 4 to about 5, silicon atoms. The following formula illustrates a cyclic volatile polydimethylsiloxane useful in the compositions disclosed herein:
Figure 0003555762
In the above, n is about 3 to about 7. Linear polydimethylsiloxane contains from about 3 to about 9 silicon atoms per molecule and has the following general formula:
(CH 3) 3 Si-O- [Si (CH 3) 2 -O] n -Si (CH 3) 3
In the above, n is about 1 to about 7. Linear volatile silicone materials typically have a viscosity of about 0.5 centistokes at 25 ° C., while cyclic materials typically have viscosities of about 10 centistokes or less. A description of various volatile silicone oils can be found in Todd et al., "Volatile Silicone Fluids for Cosmetics", Cosmetics & Toiletries, 91, pages 27-32 (1976), the disclosure of which is incorporated by reference. Therefore they are incorporated here in their entirety.
Examples of preferred volatile silicone oils useful herein include Dow Corning 344, Dow Corning 345 and Dow Corning 200 (from Dow Corning Corp.); Silicone 7207 and Silicone 7158 [Union Carbide. (Manufactured by Union Carbide Corp.); SF1202 (manufactured by General Electric); SWS-03314 (manufactured by SWS Silicones).
Preferably, the present invention also contains one or more non-volatile emollients. Such materials include hydrocarbons (eg, Permethyls), propoxylated alcohols, non-volatile silicone oils, and mixtures thereof. Useful emollients herein include 1, Cosmetics, Science and Technology, 27-104 (M. Balsam and E. Sagarin, Ed .; 1972) and the Shelton U.S. Patent issued May 13, 1980. No. 4,202,879, both of which are incorporated herein by reference.
Non-volatile silicone oils useful as emollients include polyalkyl siloxanes, polyalkylaryl siloxanes and polyether siloxane copolymers. Essentially non-volatile polyalkylsiloxanes useful herein include, for example, polydimethylsiloxane having a viscosity of from about 5 to about 100,000 centistokes at 25 ° C. Among the preferred non-volatile emollients useful in the present compositions are polydimethylsiloxanes having a viscosity of from about 10 to about 400 centistokes at 25C. Such polyalkylsiloxanes include the Vicasil series (sold by General Electric) and the Dow Corning 200 series (sold by Dow Corning). Polyalkylarylsiloxanes include polymethylphenylsiloxanes having a viscosity of about 15 to about 65 centistokes at 25 ° C. These are commercially available, for example, as SF1075 methylphenyl liquid (sold by General Electric) and 556 Cosmetic Grade Fluid (sold by Dow Corning). Useful polyether siloxane copolymers include, for example, polyoxyalkylene ether copolymers having a viscosity of from about 1200 to about 1500 centistokes at 25 ° C. Such a liquid is commercially available as SF-1066 organosilicone surfactant (available from General Electric). Polysiloxane ethylene glycol ether copolymer is a preferred copolymer for use in the present compositions.
Emollients typically comprise about 2% to about 10% by weight of the composition of the present invention, most preferably about 2% to about 6%.
However, some additional water-soluble substances can also be added to the composition of the present invention. Such substances include other humectants such as sorbitol, propylene glycol, ethoxylated glucose and hexanetriol; keratolytics such as salicylic acid; proteins, polypeptides and their derivatives; Germall 115, hydroxybenzoate Methyl, ethyl, propyl and butyl esters of acids, EDTA, Euxyl (RTM) K400, Bromopol (2-bromo-2-nitropropane-1,3-diol), phenoxypropanol, DMDM hydantoin / 3-iodo-2-propynyl butyl carbamate [glidant (Glydant ▲ R ▼) and glidant Plus (Glydant Plus ▲ R ▼) commercially available as] a water-soluble or soluble preservatives such as; Agasan (Irgasan) (in RTM and phenoxyethanol Antibacterial agent (preferably from 0.5 to about 5% Soluble or colloid-soluble moisturizing agents such as hyaluronic acid, chitosan and coloring agents; fragrances and fragrance solubilizers; alcohols; fragrances and fragrance solubilizers; It is present at a level of about 99.3% by weight, preferably about 80 to about 95%.
Other Optional Ingredients Various additional ingredients may also be added to the emulsion compositions of the present invention. These additional components include various polymers to assist in film-forming properties and formulation substantivity, preservatives to maintain the antimicrobial integrity of the composition, antioxidants and fragrances, pigments and colorants, etc. There are agents suitable for aesthetic purposes.
The compositions of the present invention are in aqueous gel form and have at least about 4000, preferably about 4000 to about 300,000 cps, more preferably about 20,000 to about 200,000 cps, especially about 80,000 to about 150,000 cps (20 ° C, neat, Brook It is preferably formulated to have a product viscosity within the field RVT). Preferably, the composition is visually translucent. The composition is substantially free of oil, i.e. it contains no more than about 1%, preferably no more than about 0.1%, of a material that is insoluble or not colloid-soluble in the aqueous gel matrix at 10C. As used herein, "colloid soluble" refers to particles in the normal colloid size range, typically 1-1000 nm, especially 1-500 nm. In a highly preferred embodiment, the composition is substantially free of materials that are insoluble or not colloid-soluble in distilled water at 20 ° C. Such substances include hydrocarbon oils and waxes, fatty alcohols, certain fatty alcohol ethers extracted from lanolin and sterols, beeswax derivatives, vegetable waxes, many conventional emollients such as sterols and amides. There are substances. However, the composition can contain low levels of insoluble components, for example, titanated mica, added for visual effect purposes.
These compositions may further contain cosolvents such as ethanol, isopropanol, butylene glycol, hexylene glycol, polyethylene glycol and polypropylene glycol.
The compositions of the present invention do not have the need for additional surfactants conventionally added to cosmetic cream and lotion compositions to emulsify the water-insoluble oil phase.
The following examples further describe and demonstrate embodiments within the scope of the present invention. The examples are provided for illustrative purposes only and should not be construed as limitations on the invention, many variations thereof being possible without departing from the spirit and scope of the invention.
The components are indicated by chemical or CTFA name.
Example I
The anti-acne composition is prepared by mixing the following components using conventional mixing techniques.
Ingredient (% W / W)
Sugar-made water 54.0
Alcohol SD40 40.0
Polyacrylamide, C 13-14 isoparaffin and laureth-7 1 4.0
Salicylic acid 2.0
1. Add commercially available water as Sepigel from Sepic to an appropriately sized container. Add polyquaternium-32 and mineral oil to the water while mixing at moderate speed (300 rpm). Separately, put alcohol in a container and cover. Using a Lightnin mixer equipped with a 3-blade paddle propeller, add the salicylic acid to the alcohol and mix at low speed (100 rpm) until all the salicylic acid is dissolved. The alcohol is slowly added to the aqueous phase to form a gel. Mix the resulting gel at moderate speed until uniform.
The compositions exhibit improved skin feel and residue properties along with excellent moisturizing, emollient, rubbing and absorption properties.
Example II
The sunless tanning composition is prepared using conventional mixing techniques as described above in Example I by mixing the following ingredients.
Ingredient (% W / W)
Sugar-made water 91.5
Polyacrylamide, C13-14 isoparaffin and laureth-7 3.0
Dihydroxyacetone 3.0
Benzyl alcohol 0.5
Example III
The anti-acne composition is prepared by mixing the following ingredients as in Example I.
Ingredient (% W / W)
Sugar water 88.0
Polyacrylamide, C13-14 isoparaffin and laureth-7 2.0
Benzoyl peroxide 10.0
Example IV
The topical analgesic composition is prepared by mixing the following components.
Ingredient (% W / W)
Sugar-made water 52.395
Alcohol SD40 40.000
Polyacrylamide, C13-14 isoparaffin and laureth-7 4.000
Ibuprofen 5.000
Glycerin 1.000
Aloe Vera Gel 0.500
Menthol 0.100
EDTA disodium 0.005
Add the alcohol to an appropriately sized container. Using a Lightnin mixer equipped with a 3-blade paddle propeller, add ibuprofen to the alcohol and mix at low speed (100 rpm) until the ibuprofen is dissolved. Add menthol to the alcohol and mix until dissolved. Separately, add water to an appropriately sized container. Add aloe vera gel and disodium EDTA to the water and mix at low speed (100 rpm) until completely dissolved. The aqueous phase is then added to the alcohol phase and mixed until clear. Add glycerin and mix until clear. Add polyacrylamide, C13-14 isoparaffin and laureth-7 while mixing at moderate speed (300 rpm) to form a gel. Mix the resulting gel at moderate speed until uniform.
Example V
The anti-acne composition is prepared by mixing the following components as in Example I, except that the pH is adjusted to about 4.0 or less with a 10% citric acid solution.
Ingredient (% W / W)
Sugar-made water 87.5
Polyacrylamide, C13-14 isoparaffin and laureth-7 2.0
Urea 10.0
Benzine alcohol 0.5
Example VI
The moisturizing composition is prepared by mixing the following ingredients as in Example I.
Ingredient (% W / W)
Sugar-made water 93.5
Polyacrylamide, C13-14 isoparaffin and laureth-7 2.0
Glycerin 3.0
Benzine alcohol 0.5
2-pyrrolidone-5-carboxylic acid 1.0

Claims (8)

（ａ）1,000,000〜30,000,000の分子量を有する非イオン性架橋ポリアクリルアミド0.05〜20％；及び
（ｂ）サリチル酸、イオウ、レゾルシノール、Ｎ−アセチルシステイン、オクトピロックス、レチノイド、過酸化ベンゾイル、エリトロマイシン、テトラサイクリン、アゼライン酸、フォノキシエタノール、フェノキシプロパノール、酢酸エチル、クリンダマイシン、メクロサイクリン、フラビノイド、乳酸、グリコール酸、ピルビン酸、フマル酸、尿素、硫酸シムノール、デオキシコール酸塩、コール酸塩及びそれらの混合物からなる群より選択される化合物0.1〜20％；
を含む水性ゲル形態のスキンケア組成物であって、3.5以下のpHを有する組成物。(A) 0.05-20% of a nonionic crosslinked polyacrylamide having a molecular weight of 1,000,000-30,000,000; and (b) salicylic acid, sulfur, resorcinol, N-acetylcysteine, octopirox, retinoid, benzoyl peroxide, erythromycin, Tetracycline, azelaic acid, phonoxyethanol, phenoxypropanol, ethyl acetate, clindamycin, meclocycline, flavinoid, lactic acid, glycolic acid, pyruvate, fumaric acid, urea, simnol sulfate, deoxycholate, cholate and 0.1-20% of a compound selected from the group consisting of mixtures thereof;
A skin care composition in the form of an aqueous gel, comprising: a composition having a pH of 3.5 or less. ポリアクリルアミドが、非置換であるか又は炭素原子１〜５を有する少くとも１つのアルキル基で置換されたアクリルアミド及びメタクリルアミドから選択されるモノマーを含む、請求項１に記載の組成物。The composition according to claim 1, wherein the polyacrylamide comprises a monomer selected from acrylamide and methacrylamide, unsubstituted or substituted with at least one alkyl group having 1 to 5 carbon atoms. ポリアクリルアミドが、アクリルアミド、メタクリルアミド、Ｎ−メチルアクリルアミド、Ｎ−メチルメタクリルアミド、N,N−ジメチルメタクリルアミド、Ｎ−イソプロピルアクリルアミド、Ｎ−イソプロピルメタクリルアミド及びN,N−ジメチルアクリルアミドからなる群より選択されるモノマーを含む、請求項２に記載の組成物。The polyacrylamide is selected from the group consisting of acrylamide, methacrylamide, N-methylacrylamide, N-methylmethacrylamide, N, N-dimethylmethacrylamide, N-isopropylacrylamide, N-isopropylmethacrylamide and N, N-dimethylacrylamide 3. The composition according to claim 2, comprising a monomer to be prepared. 組成物が保湿剤を更に含む、請求項３に記載の組成物。The composition of claim 3, wherein the composition further comprises a humectant. 保湿剤が、ポリヒドロキシアルコール類、グリセリン、ヘキサントリオール、プロピレングリコール、ヘキシレングリコール、ポリエチレングリコール、２−ピロリドン−５−カルボン酸、Ｄ−パンテノール、ヒアルロン酸、ラクタミドモノエタノールアミン、アセトアミドモノエタノールアミン及びそれらの混合物からなる群より選択される、請求項４に記載の組成物。Moisturizers include polyhydroxy alcohols, glycerin, hexanetriol, propylene glycol, hexylene glycol, polyethylene glycol, 2-pyrrolidone-5-carboxylic acid, D-panthenol, hyaluronic acid, lactamide monoethanolamine, acetamidomonoethanol The composition of claim 4, wherein the composition is selected from the group consisting of amines and mixtures thereof. 組成物が皮膚軟化剤に更に含む、請求項５に記載の組成物。The composition of claim 5, wherein the composition further comprises an emollient. 皮膚軟化剤が、ポリアルキルシロキサン、ポリアルキルアリールシロキサン及びポリエーテルシロキサンコポリマーからなる群より選択される非揮発性シリコーン油である、請求項６に記載の組成物。7. The composition of claim 6, wherein the emollient is a non-volatile silicone oil selected from the group consisting of polyalkyl siloxanes, polyalkylaryl siloxanes, and polyether siloxane copolymers. 組成物が日焼け止め活性剤を更に含む、請求項５に記載の組成物。The composition of claim 5, wherein the composition further comprises a sunscreen active.
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